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Method for preparing carbon nanotube array supported lithium titanate flexible electrode material

A carbon nanotube array and flexible electrode technology, which is applied in the field of electrochemical energy storage, can solve the problems of difficult control process steps, cumbersome and complicated preparation process, and low orientation of carbon nanotube arrays, and achieve good structural stability and shorten diffusion path, the effect of reducing contact resistance

Active Publication Date: 2019-10-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above patents have improved the Li 4 Ti 5 o 2 The reversible capacity and cycle life of the negative electrode material, but the orientation of the carbon nanotube array is not high, and the carbon nanotubes are prone to winding and agglomeration during the high-current charge and discharge process, and the preparation process is cumbersome and complicated, and it is difficult to control the process steps. Applications of lithium-ion batteries

Method used

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  • Method for preparing carbon nanotube array supported lithium titanate flexible electrode material
  • Method for preparing carbon nanotube array supported lithium titanate flexible electrode material
  • Method for preparing carbon nanotube array supported lithium titanate flexible electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) Utilize impregnation method to support carbon nanotube catalyst on carbon cloth;

[0039] Dissolve 3.00 g of iron acetylacetonate, 1.14 g of aluminum acetylacetonate, 1.61 g of 1,2-hexadecanediol, 0.9 g of oleic acid, and 0.9 g of oleylamine in a mixed solution of 50 mL of dibenzyl ether, and use the reflux method to A carbon nanotube catalyst was prepared, wherein the reflux temperature was 200° C. and the reflux time was 60 min to obtain a carbon nanotube catalyst. Then soak the carbon cloth in the carbon nanotube catalyst solution, take it out and dry it, and obtain the carbon cloth carrying the carbon nanotube catalyst.

[0040] (2) In-situ vertical growth of carbon nanotube arrays by chemical vapor deposition;

[0041] The carbon of the supported carbon nanotube catalyst prepared in step (1) is arranged in the constant temperature zone of the tube furnace, and under vacuum conditions, the tube furnace is heated to 850 ° C under the protection of an argon gas a...

Embodiment 2

[0051] (1) Utilize impregnation method to support carbon nanotube catalyst on carbon cloth;

[0052] Dissolve 3.00 g of iron acetylacetonate, 0.57 g of aluminum acetylacetonate, 3.22 g of 1,2-hexadecanediol, 0.30 g of oleic acid, and 2.25 g of oleylamine in a mixed solution of 50 mL of dibenzyl ether, and use the reflux method to A carbon nanotube catalyst was prepared, wherein the reflux temperature was 220° C. and the reflux time was 240 min to obtain a carbon nanotube catalyst. Then soak the carbon cloth in the carbon nanotube catalyst solution, take it out and dry it, and obtain the carbon cloth carrying the carbon nanotube catalyst.

[0053] (2) In-situ vertical growth of carbon nanotube arrays by chemical vapor deposition;

[0054] The carbon of the supported carbon nanotube catalyst prepared in step (1) is arranged in the constant temperature zone of the tube furnace, and under vacuum conditions, the tube furnace is heated to 700 ° C under the protection of an argon ga...

Embodiment 3

[0059] (1) Utilize impregnation method to support carbon nanotube catalyst on carbon cloth;

[0060] Dissolve 0.6g of iron acetylacetonate, 0.57g of aluminum acetylacetonate, 4.385g of 1,2-hexadecanediol, 1.8g of oleic acid, and 0.2g of oleylamine in a mixed solution of 200mL of dibenzyl ether, and use the reflux method to A carbon nanotube catalyst was prepared, wherein the reflux temperature was 300° C. and the reflux time was 1 min to obtain a carbon nanotube catalyst. Then soak the carbon cloth in the carbon nanotube catalyst solution, take it out and dry it, and obtain the carbon cloth carrying the carbon nanotube catalyst.

[0061] (2) In-situ vertical growth of carbon nanotube arrays by chemical vapor deposition;

[0062] The carbon of the supported carbon nanotube catalyst prepared in step (1) is arranged in the constant temperature zone of the tube furnace, and under vacuum conditions, the tube furnace is heated to 1200 ° C under the protection of an argon gas atmosp...

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Abstract

The invention provides a method for preparing a carbon nanotube array supported lithium titanate flexible electrode material. A carbon nanotube array is grown on a catalyst-supported carbon cloth by achemical vapor deposition method to be a flexible substrate, and the carbon nanotube array supported lithium titanate flexible electrode material is prepared through a sol-gel method and a high-temperature calcination process. The method comprises the steps of loading a carbon nanotube catalyst on the carbon cloth by using a dipping method, performing in-situ vertical growth of the carbon nanotube array by using the chemical vapor deposition method, and preparing the carbon nanotube array supported lithium titanate flexible electrode material by using the sol-gel method and a high-temperaturecalcination method.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube array loaded lithium titanate flexible electrode material, in particular to a flexible electrode material for electrochemical energy storage, which belongs to the field of electrochemical energy storage. Background technique [0002] With the massive consumption of non-renewable energy such as fossil fuels, global ecological problems have become increasingly prominent, and the energy crisis in various countries has intensified. Therefore, it is particularly important to develop new green and clean energy. Lithium-ion battery is a new type of power source that is emerging in line with the current energy development form. Lithium-ion batteries have the characteristics of high energy density, high working voltage, long cycle life, fast charging speed, no memory effect and no environmental pollution, so they have been widely used in energy storage fields such as electric vehicles and portab...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00
CPCH01M4/362H01M4/485H01M4/625H01M4/628H01M10/0525B82Y30/00H01M2004/027Y02E60/10
Inventor 赵乃勤李乐沙军威马丽颖李群英
Owner TIANJIN UNIV
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